Machine for cutting oil grooves



June 26, 1928.

l 1,675,136 E. P. SACREY MACHINE FOR CUTTING OIL GROOVES 2 Filed May l, 1924 8 Sheets-Sheet l 9/ 92- 32 Z y da 4 l"r A) Ff/7 n l-/7/ l `/0 i JL 2,* /0'7 ,65 2 @9 @0 /5 i j.. /45

j* d /dg June 26, 1928.

E. P. sAcREY MACHINE FOR CUTTING OIL GROOVES Filed May l, 1924 8 Sheets-Sheet 2 June 26, 1928.

1,675,136 E. P. SACREY MACHINE FOR CUTTING OIL GRoovEs Filed May 1.` 1924 8 Sheets-Sheet 3 Jne 26, 1928.

E. P. SACREY MACHINE FOR CUTTING OIL GROOVES Filed May l, 1924 8 Sheets-5h66?, 4

June 26, 1928.

E. P. SACREY MACHINE FOR CUTTING OIL GROOVES Filed May 1, 1924 8 Sheets-Sheet 5 June 26, 1928.

E. P. SACREY MACHINE FOR CUTTING OIL GRoovEs 8 Shee ts-Sheet 6 jg.

Filed May 1. 1924 Q/ Qqs June 26,- 1928. 1,675,136 E. P. sAcREY MACHINE FOR CUTTING OIL GROOVES June 26, 1928.

Mig

Patented .lune 26, 1928.

LMER P. SACREY, of netrunner-111A, rnnnsvtvgnre.

MACHINE FOR CUTTING 0113 GROQ'VS,

Application med-May 1', 1h24. Serial No'. 710,395.I

This invention relates to machines particuhrrly adapted for cuttingl oilA grooves' in the inner surfaces ofrbearings, bushings and the like, and also for cutting vgrooves for key-ways and splines,- and for' die slotting.

.'1` he invent-ion residesin a' novel arr-enge# ment of elements affording highly eflicient operation and diurabilityi My invention 'isillustrated in the attached clravvi-'irgs,l in which:

Figue'l is :i plan View ofi a machine mad in-faecordnnce with my invent-in;

Fig. 2- is :mf inverted plnnvicw of the ma- VFig. 3ds-as ection on the line 3 3, Fig.

Fig. 4- is :isection on the line 4 4, Fig.

- F 5 isi-a section' on the line 5 5, Fig.

Figi. G is' :if s'ectibn oli-*the line 6 6, Fig. s

Fig.- isa section on the line 7 7, Fig.

Fig. 8 is :x-seetion onfthe line 8 8,Fig.

Fig.L 9 fragmentary section on theiline 9 4), Fig. 7i; f :1`A f n Fig. 10 is afragmentary .elevation 'illustrntiiig the operating lever andvother details of the machine;

Fig. 1ll isv zu section-on the line 1-1 1l, Fiig. 10';

Fig'. 12v is zr face view of a detail of the invention; l

F ig.- 13 is n view similar to-Fig. 11, showing` an alternate position of the element shown in Fig. 12;

Fig. Ll is 'a section on the line M llr, Fig. i,

Fig-15 is a elements;

Fig.- 16 is a fragmentary section on the line 16-16, Fig-1;

Fig. 1T is afragmentary section on the line 17 17, Fig. 3;

Figs. 18 und 19 nrcrespectively, detached perspectives of the telescoping tool control elements :l

Fig'. 20-is a-d'etached elevzition illustrating one et the elements of that portion of the meel'innismillustrated in Fig. 9;-

Fig. 21 is' al frgmentary inverted plan view illustrating` n furtherdetail 'of this portion of the mechanism; Fig. 22 is n development of' the interior o- :t bearing illustrttin'gcne type of groove the intel-rupteol figure eight)y which may be termed by my machine;

Fig-23.1' is' a like view illustrating the same plan view ofone of the chuck genci'alr form of groove', except that it is niadewit-h'a continuouscut; Y

Figs to 31, inclusive, are', respectively, vieus similar to F igs.- 22 and 23', illustrating other forms of giobveswhich may be' formed by my machine;

Figs. 32- amd'33 are', respectively, sectional and side elevations` 'of a Vmodified form of cer-"tem details ofthe invention;

Figs; 3,4 and 35 afiie'sectionalvicws taken on' the lilies 34e-34 and 35.435- Fig.- 32;

'Fig'. 36 isn plan View ofi the-die'slotting attachment; ,l

'Fig 37 isanv elevation of the die slotting attachment and the upper end of the' machine to which the attachmentI is' applied,

Fig. 3S Fig. 36. i

"Yllith reference to the drawings, the machine comiliiisesfal main frame'l- Ahving seourdat oneV side 'a bracketar-m '2,- the'outer end' 'off which "forms" a" journal- 3' forl :L shaft 4f, this Shzifzt al'sozha'vingbearing, 5 secured in` the' saiclframe.- The shaft 4- carries'intermediate its: ends a loose'pulley 6 'and a.'fast pulley 7, whiclifletter is keyed to the sha-ft as indichtetifat 8. Thesepulleys are' adapted to be 'connected 'by means of a suit-able belt withT an' external" Source ofV power (not shown) :uid-atbelt shifter 10 is-providedfor shiftingthe belt from one pulley to the other.-

Secured to the inner en'cl of the shaft 4 is ai' bevel pinion 9 which' meshes with n secondpinion l-l-"keyed to'a vertical shaft 12 nndfsupported on saidf shaft by means, in the present insta-nce, of a-se't screw 13. This shaft 12'is'jo1rnaled at the bottom in e bearingv Mend :it the topin a bearing 15 is n section on the line 38 38,

.foiined inat suitable ring 16 forming part of t-'liei frame 1. A colla-r 17 supports the sh'rif-.t at the bottom. as clearly illustrated in Fig. 3: The shaft 12 carries atthe' top aJgeail`18whieh meshes withl agear 19up0n n' secondi ver-tienil sliaft 21, fh-ich latter, as best shown inFi'g. is journziled ab the to'p .in :ai heaving.' Y2.93 and.- at thfebottom in :n bearing 23. The shaft 21 is divided and com'- prise'snn upper section 24' which carries the pinion 19- and` which is" supported in the bearing 22; and a lower section-25'wl1ich is counterbored' :it th'e top tor receive the reducedA leiter end 26,` {see Figure 4) of the which extend bearing elements 32, 32,

section 24. The two sections arev adapted to be operatively connected by .means of a clutch 27 including an element28 splined to the shaft 21 and a second element 29 keyed to the shaft section 24. The splinedv element 28 comprises a circumferential re` cess 31, (see Figure 6) into opposite sidespof 1votally secured to the extremities of the forked end 33 of a clutch operating lever' 34, which latter is pivotally mounted upon a shaft 35 journaled at 36 in the casing. The. free end of the lever 34 projects through an opening 37 in the casing 1 and is provided at its outer end with 'an adjustable -head 38 having on its inner face teeth 39= adapted to engage in one or other of a p airv of recesses 41 in the'casing l at,the edges of the open- 37. As shownin Fig. 6, the head 38 is normally held inwardly of the spindle by means of Ya spring;.42confined between the movable portion of the head and a nut 43 threaded on the end ,of the lever.v This arrangement provides for the release of the teeth 39 from .the recesses'41 so that the lever may be rocked from one position to another, thereby engaging or disengaging the clutch 27 at will.

As clearly shown in Fig. 4, the lower section 25 ofv thev shaft- 21l carries, loosely mounted thereon, a gear 44, the latter being supported on acollar 45 secured to the'shaft by a set'screw 46. Secured tov the gear 44 and dependingr` therefroml is a sleeve 47 .shown in perspective' in Fig. 18, the interior surface of which sleeve is provided with a series of spiral teeth 48. Splined to the shaft below the gear 44 is a second sleeve 49 .shown in perspective in Fig. 19, which is adapted to telescope with the sleeve 47'and which is provided on its outer face and at the top'of the sleeve with a series of spirally arranged teeth 51 adapted to mesh with the teeth 48 of thesleeve 47. The sleeve 49 is also provided below the teeth 51 with a pair of Hangcs 52, 52, forming between them a. circumferenti'alrccess'into which eX- tends the extremities of a forked arm 53 of a Sleeve 54 slidably'supported upon a vertical rod 55, which latter is'niounted in a lug 56 of the frame 1. As best shown in Fig. 9, the sleeve 54 is provided with teeth 57 constituting1r a rack which meshes with the teeth of a segmental gear 58 on a lever 59 loosely mounted on a countershaft 61 journaled in a suitable bearing on the frame, the outer end of the shaft being provided with an operating lever 62, as shown in Figs. 4, 7 and 10.

Operative connection is made between the lever 59 and the shaft 61 through a spring 68, (see Figure 21), one end of which is secured by a bolt 64 to the said lever, while the other end hooks around a pin 65 set in a. recess in the end of the shaft 61, and secured therein by a screw 66. Relative movement between the lever and the-shaft is limited by this? pin G5, 'Which'is adapted to be engaged by shoulders 67 and 68 on the hub of the lever, as clearly'shown in Figs. 20 and 21.

As indicatedin Fig. 9, the tension of the spring l63 may be adjusted by changing the position ofthe securing bolt 64 in the lever, a number of tapped apertures 69 being provided in the lever for that purpose.

With theV described construction, 1itwill be apparent that movement of the lever 62. will rock the shaft 61, and through the spring 63 will also rock the lever 59, thereby elevating` or lowering -thesleeve 54 and with it the sleeve 49. y

One arm of the lever T59 is provided. with a roller 71which rides upon the surface of a cam 72 carried by a countershaft 73 journaled inI suitable bearings 74 in the frame l. The shaft l73 vreceives a rotary .motion through a spiral gear75 .which meshes with a. spiral pinion 76 upon a vertical shaft -77 suitably journaled Aand supported4 in. the main frame. .This shaft 77 carries atthe topa gear 78 which meshes with-a gear. 79 on the top of the shaft 21,. VThe cam 72 is keyed to the countershaft-73 and is secured .to the shaft byv-'a-ut =81,-and a1 coverfplate 82 is lprovided in thencasingopposite that end of the shaft; 73 to which the .cam is secured, the removal-of-whicli affords free accessto the cam and'permits its removal and the substitution therefor of-.other cams.

' The shaft-77 similar'to the'shaft A21 is divided and comprises upper and lower sections 83an'd .-84'which are connected by a clutch 85 similar in allrespect-s to the clutch 27 and comprising an operating lever 86 which may be similar to the lever 34 of the clutch 27 and which may in similar manner -be locked in alternate positions engaging and disengaging the clutch. A

It will be noted by reference to Fig. 10 that adjustable means is provided for limiting the extent of movement of the lever 62, this means consist-ing in the present instance of an arm'87 at the base of .sja-id lever which projects outwardly between two bolts 88 and 89 adjustable in a slot 91 on the side of the casing. As illustrated i-n Fig. 10, the bolt 88 in the present instance stops the lever 87 in the neutral position, while the bolt .89 constitutes a stop for the extreme operative position of the lever', and as hereinafter described controls the depth of cut.

A spring pressed pin 90 is carried by the arm 87 and constitutes with a toothed element 92 a ratchet detent which while permitting advancement of the lever into the operative positions normally prevents return unt-il the said pin is manually withdrawn from the teeth. This device, as hereinafter described, is useful in the cutting of interriipted grooves, The element 92, is attached t0 the frame 0r Casa e by a belt 13. is detachable, and in reverser "postiee PP@- fents tothe .tapered @mi Qt .the )in .it ,Single comparatively deep and @baresi notch 94, see igs. Tand 1B, which .tends to retain the lever'in a. neutral or inoperative position. Haile .tending .te retain the lever, the notch, ,9% because .ef its shape dees not prevent movement of thele'ver from the neutrai PsitiQn in either direction. The eath 94 SHSQiiL es hereinafter described, in Cntting certain forni'sfof continuonsgrpoves. By a, 90 turn of the p ln 9 0 `v151er Withdrawal from ,the peeitienf Sheiiin Ff 1.1 end. ,13, th.;` said p'inlinay be r e a ;i ned in' the retracted and inofi'ativ' liOStQn 'ne' sima 121 eerie, m adding to 111.@ ,ge-'ir .14 and :lit tlie'betteilef the Shaft, .a 'gear .95 inthe nreert 'inst-enc@ ef the Sam@ Size as the 5.44.' ed 'geel' 95 mslimg with a gear 96 spline@ te @51.121197 ",@ftieftt 'ly Supported inbftaeues 94.3 1t the bottom and at the top of the frame. The upper end o f the 511511697 which have lesigna'ted in the present instance bythe reference nnrnei'al lOlS enlarged and "is hellen', and in the interior of this'h'olloyv portion 1.01 is pivotally mounted a Atool carrier 1024. This `ca rrier, as best shown in 1f?, is pivotally lnouiited lip-.Oil treiwieiif '.103 .formed in vthe ,Present 'instance by .Serevs thritle inta .the said carrier 102, the heads of the serevvsJ copstitntinlr the trlinnion's proper, being jonrnaled in siiitabl' in' thehollgjiy portion'101 of the shaft Thetool carrier 102 comprises at lthe-top a chiieklintoyvlrieh the tool "lioldei104 sec-u red oy I 'neansoi a mit 105, see Fini. 35 and xllio comprises a c lepending arrnl 1.0 6 ivhieh tends down through the'hollmv shaft section 101 and carries at ithe `bottom 1-'head '10.7 having at opposite sides rollers I10S li'vhieh project throfu'gh openings 109 in the sideof the hollow Shaft section" andengageca'ms 111, 111, the. latter-being carried hollow .sleeve 112, which embraces t-he shaft 97 and the hollow Section 101 ofthelatter, anlbeing also provided with Ast iitable side aperttlres 113 through which the .said rollers 10S have access to the earns 111 whichare securedby means of bolts 111a'or the like in eaid openings 1:13. all as clearly shown in Figs. 3 and 5. i

The sleeve 112 suspended from the `top er" the casingv by a sirpporting ring 1L/1f, arfd iaaid sleeve carries at its lower e n d a .gear .115 which meshes with the gear 51e Q, n'the .aha it 21. The gear 115 isoitlie saine ,'-;'i z e i n the present `i n s ,t a x ice as the gearQ o 'ii'ijhe shaft 9,7. springl 1 1 6 seciirel tothe tool @lm-ier 102. @dan shea-liggen@ che ed@ o f the 'hollow shaft section '101,` as shown Eie- '3, rev nts emesse-effe@.ernment10 tliefilierffiboet itt ,evet- @here S19' scribed arrangement of elements is sach that the sleeve 1312" adapted to rotate W1th`the shaft 97,' While at the saine timebeing ca pablo of angularinoverneiit vvith respect to the Said shaft 97. Y' VlLooelymounted on the Shaft but adapted to move with the shaft iii its movement is an arrnllr' which constitntes a 'jonrnal' pin for a connectin rod'1`18. The outer endi'of the arm 117l carries a cross head 11S) which reeiprocates upon a shaft 121 suitably supported in the frame inbearings 122 and 12215 4"lilie conn(actingrod 118 connects vthe rod llf'ivith a'era'nk pin o n t-lrefend of a shaft 125 jonrnaled' in "Healinve 120 and 127 in the'a'ing. The Shaft'12;freceiye-. its rotary movement bevel g9ar`128 which keyedto the shaft and which meshes with :Irpinipnl fifthe top of tnhe shaft 121. -`'l"hes, liaft '12"1cgirris at its l'ovver eni'l a gear ll'nfhich lwith l a lgear 132 on'a short' idler shaft 1133 joui-nale@ in the 'bottom of the casing. fear 132 meshes wilh a gear 134. rkeyed to he lower end of the ls haft 77 whereby the shaft 121 is operatively connectedltlirough the intervening mechanism with the )alley 'Shaft 4. The shaft- -125 has a heal 35 at its inner end, and the said hea'dg'asielearly' s hovvn in Fig. 5', is provided vi th"al gnide slot 13 6 :having ilnitred edges. 4Slidable in this slot "136 isa member '137 vjh'ic h"carri es the c ranlc pin Y1241,and'this eleinritfcarri'es one of ar e c es s inits' baclsnrface af rack 138. Also fittingir intothe'sa'id recess and meshingT Withthe rz'rek'is a" inion 139 the yend of a hollow shr'ftfltlliwhich' extends lln'oug'h the shaft 125 and :haai-keyed tolhe outer projecting endfl'hereof a nut .1112. A bol-t- 1125 ey tends lthroiigrh' the holloivn shaft 1511 'and is p rorided with 'a beveled rectangular'head "1411 established ina .veorrespondjn-gr recess in the upper Split end the xmembe151,237. 'The oiitei end of `the bolt lfi'eari'ie's a nut 145 by means of whichy the bolt may be tightened li`llel9by (11.0 nllip'er divided partsof the memb er 137 are spread apart and forced tightlv against the initred faces of'th-e slot in the head whereby-the member 137 locked tightly in 111.0 dCFICd position in the Said i fhead.

1t will be apparent that by AlooseningT the nut 145, the nut 142 maybe tiirned'toshi'ft the member 137 up in'fthe slot 18.6 throirgh the pinion on the dnd of the shaft 141 'the l rack 138 on the said member.v By'thus adjustine' the crank pin 124- with respect'ito the centerline of'th'e shaft 1 25,t he throxv of the ,vertical reeiprocat ry movement of the Shaft 97 .tfite'fb itite .The .Weight @f .the Shaft `QT'and associated 'in oviiia'parts is eunteibeeeed id .the reseiitiefbtauce by a spring 1.46. Fie eediistably Seemed at ene eed t0 .the freine effliilt te@ @het end .to en een .15.0. eiretelly were@ et 1.29 .to

llfl

the arm 117 and also to a link 130 pivotally secured at its lower end to the frame.

Adj ustably carried at .the top of the frame 1 is a chuck or work-holder 147, the chuck in the present instance being supported upon three perpendicular rods 148 which are releasably supported by the clamps 149, 149.

The chuck comprises a ring 151 shown in plan in Fig. 15, which rests within a recess 152 iu the head and has in its periphery a plurality of tapped holes 153 for the recep- .direction of rotation.- The jaws 157 l are adapted to grip the work and to center it over the shaft 97 in a vertical position, as shown in Figs. 1 and 3. The periphery .of the ring 151 is also provided with teeth, and these teeth are adapted to mesh with a pinion 158 on a stem 159, which latter has Aa crank handle 161 at its top and is adapted to be fitted within a bearing opening 162 in the head shown in Figs. 1 and 16. By'means of this crank, the ring 151 vmay be rotatedat will to feed .thejaws 157 in and .out for adjusting the chuck` to receive pieces of work of various sizes.v The chuck also comprises an adjustable work support 163-which comprises' a body piece 164 which is secured to the chuck head by means of a bolt 165, which latterl passes through aslot 166 inthe said body .whereby the latter may be adj usted towards and from the work. The .support further comprises an arm 167 which is slidable vertically `upon the face'of the body piece 164 and which is provided with a foot 168 adapted to support the work, as shown in Fig. 3. The chuck is adapted for speed operation in engaging and disengaging successive pieces of work of a uniform size by reason of the fact that after the jaws have been adjusted by mea-ns of the crank 158-161 to grip the first of said successive pieces of work, the latter may be rapidly released by means of the handle 154, and may be as rapidly returned by the same handle to grip a new piece of work after it has been inserted. It is merely necessary to drop the work between the jaws, it being supported in proper position by means of the work support 164- 168.

The operation of the machine in so far as described is as follows: The work being mounted in the chuck in the aforedescribed manner, power is applied through the pulley 7 and the shaft 4. By reason of the connection between the shaft 4 and the shaft 12, .the shaft 12 is rotated and with it the shaft 21 with the intermeshing of the'gears 112, andthe gears are so arranged that normally the V sleeve 112 will rotate at exactly the same'rate of speed as the shaft 1 By pulling over; the lever 62, the ,memberQ 49 iselevated,. with4 the .result that l'the angular relation'between the'gear44 andthe shaft 21 is changed,.th i s hav1ng the effect also of alter- '-ingthenormal angular relation between the shaft 97 and thev sleeve ,1112, This has the effect through thev cams 111 of rockingth'e tool carrier 102 on .its pivot, with the result that the toolisbrought against' the surface o f the work. In the meantima'p'ower from the shaft4isapplied through. the intermediate' mechanism to v'the shaft 121', which by rotating the shaft-125 efectsa Avertical"reciprocatioxi -of -the shaftl97, .which causes the tool to traverse the work. in a'reciprocatory movement. Obviously the General form of the groove isgovernedby-tihe gearing controlling the rotational and longitudinal velocities ofthe tool. .v l' i i f i Only Whereinterrupted groovesare desired isthfeicam 72 lemployed. With vthe tool normally retained-through the lever 62 in theoperative 'or cutting.position, this cam acts to periodically lower the member 49 and to therebygolg-thetool,free from the work. During thecutting, .i n thi s manner, of an .interrupted groove,'the lever 62 is retained lcontinuoiisly. inl the. operatve position, and

the movement of the tool 4independent of the lever is-providd for by the spring 63 forming av tlexibleconiiection between the shaft 61 and the lever. Obviousythe cam 72 may be replaced by -other cams to vary the char'- acterof the interruption. In the absence of .the cam' 72 or its alternate, the grooves,

unless interrupted manually through manipulation ofthe operating lever, will be continuous. i

By means of the rotarymovernent of the tool and itsreciprocatory movement, and by reason of the cam 72 which automatically retractsgthe tool from' the work, practically any form or nature of groove may be formed. Figures 22 to 31, inclusive, are illustrative of some of the types of grooves which may be formed with this machine.

By disengaging the clutch 27 and by tightening the clamp shown in Fig.- 8, itis possible toobtain a longitudinal groove in the Work, which groove may be continuous, or interrupted to any extent desired by use of a cam 72 of suitable form. The aforesaid clamp .consists of a stem 171 having a suitable. crank or handle 172 at its outer end and threaded into the opening in the basef'plate 173 of the casing.' 'Ihe innerv end yof the stem 171 bears against a block 174, which'by engagement with the hub of the ge'ar96 is adapted to retainthe latter immovable. This, however, vdoes not interfere with the axial reciprocation of the shaft 97, and the fact that the lower part 25 of the shaft 21, through the gear 95is held fixed, makes yit possi' le through the telescoing l,members 47'and- 49 to retract the tool 1om the work at will inthe manner previously described. l i,

.Where the lcircumferential groove is desired, this may bel accomplished by disengaging the elutch which throws thje reclprocatingv mechanism out of operation. In this instance, the rotation of the'shaft 97 .accomplished as previously described. vIfit is desired toyrobtain' an interrupted grooveof this type, it is necessary to shift lthe crank pin 124 until it is concentric with they shaft 125, to leave the clutchfS inlengagemennand to adjust the member '167 of the lchuck so that the work will assume a lposition .to receive the` cut at the desired point. VVh-ile thisprevents the reciprocavtion of the shaftf9771, itstill makes possible the intermittent engagement and. disengagement of the tool with lthe work.

.i4-particularly valuable feature of theinvention resides inthe ability for Vcontinuous loperation of the machine without stopping the v,cutter,spindle While changing thepieces of work. It is alsiojdesir'able, or production,

-tonsetthe chuckjawsso that their tops eX- ten l .toa point substantially adjacent the upper, end ofthe tool travel I in reciprocating, whereby the Work inserted in,the chuck may be centered beforethe tool can contact with thc-new pieces of work due to the cutter spindle having been axially'aligned with the shaft 101, before removing the Afinished ,piece of work, thus rotating around and reciprocating longitudinally on the center of rotation of said shaft, whichkeeps the cuttery point moving in a radius less than the inner diameter of the new piece of work. The jaws of the chuck are moved to an extent: just permitting release of the work. The amount of movement of the chuck jaws is limited by the length of the slot 155 in which the chuck handle 154 operates. Thus the work engaging faces of the jaws are held to receive a new piece of work to a circle slightly greater than the outer diameter of the n ew` piece of work which, when. inserted -between the jaws, can not'be moved to a point suiiiciently eccentric with respect to the circular path traversed by the point of the cutter to contact with said point. The chuck handle 154 is then moved to lock the work in the chuck, and the operating handle 62 subsequently moves to effect contact of the cutter point with the new piece of Work.

During the cutting of an interrupted roo've, the action of the cam '72 has a tenenc to effect ,the l operating lever 62, making l1t difficult for an operator to maintain an even pressure during -the cutting peration. This -is avoided by lthe aforedesc'ri-bed ratchet device -492, which holdsthe lever in the position to which it has been advanced at the time'the cam operates. vWVhere double grooves are required, a double pointed toolinay be usedend the lever '62 forced from a-neutralposition, las indicated by the notch 94, successively in opposite'directions.

In Figs. 32-to 35, inclusive, I have illustrated a modification lin the mechanism adapted. particularly forthe groovi'ng of large work. In the modification, the princip e of operation is essentially the, sani'fe as in the embodiment previously described, but in the 'present instance, 'instead `o`f 'mounting the tool in a p ivotiedr-holder, the

been indicatedby'the As`ai'ne`- reference numerals employed tod'esignate the corresponding parts of V'the previously described embodiment. i

In this case,,aslpreiiiousl-the tool 'spindle or shaft 97 extends uprpth'rough the "cani sleeve'112.andhjprhp'risesthe upper enlarged portion l101,',whichcarrie's' yat the 'top a head 17.8 forn'iingfa fortheftoollholder 1179, the, latter' inging ,heldA to Aum? head by a dvetailec'lv guide Awhich Atits within a corresponding,transverse recess in the under side of saidliolde. ''.'fouii'aled in thel head. 178 concentricrwith the shaft 97 and 'free to rotate with 'respect thereto is an inner shaft 182 secured at the bottom in a member 183 journaled in the shaft 97. lT he'sha 182 carries at thev top a pinion 184 which lies within a suitable'rccess 185 in the under side of the'liolder 179 and meshing' with a rack 186 sec'v'ured to the holder and occupying one side of sai-d recess. The member 183 hasV extending 4therefrom arms ,187 yand 188- having on their 'extremities vrollersf1`89 which travel in slots 191 in'V guide elements 192 corresponding to the cams 111 in the previously described embodiment and rotated in the same .manner through the ,gear 115 carried by the sleeve 112. Openings 193, 193, provide passage for the arms 187 and 1'88 through the shaft part 101.

The tool holder 179 is provided with a 'V- shaped recess for reception of the tool194, and a clamp 195 holds the tool in place.

In this instance, relative rotational movement between the guides 192 and the spindle 97 is obtained by the same mechanism as ius previously described, such relative movement resulting in a corresponding rotation ofthe pinion184 with respect to the holder 179 and a consequent lateral movement of the holder on the head 178.

The application of thisdevice to the ma! chine will be readily understood.

The machine is also adapted for die slotting'and keyway cutting, and for this purpose, I may replace the chuck at the top of the machine by a specially formed holderillustrated in Figs. 36, 37 and 38.. This holder consists of a Ahead 197 which isA supported at the tops of -the support rods 148. T he head 197 slidably supports a. carrier 198, and this carrier through a feed screw 199, which is mount-ed in theic'arrier and 'which engages a threaded portion 201 'of the body 197,'is adapted to be advanced and is held in any desired position on the said head. The carrier comprises a ring-shaped member 202 in which is set a rotary head 203, the latter being retained in the ring 202 by means of a beveled nut 204fscrewed to the under side of the head. and engaging the beveled inner edges of thering 202,V as clearly shown in Fig. 38. This construction while holding the head 203 to the ring 202 permits free rotation of the head, and for this purpose I provide on the latter a worin wheel 205 which meshes with a worm 206 on the end of a sha-ft 207 suitably journaled in a bearing 208 and having at its outer end a crank or handle 209. By rotation of the shaft 208, the head 203 may be rotated at will upon its support. clearly illustrated, is provided with T-slot-s 211 for recept-ion of T-headed bolts by means of which the work may be secured tothe head. In the slotting work, the machine parts operate and function in exactly the same manner as previously described. In a great 4majority of keyway cutting operations, the regular three-jawed chuck may be used to advantage.

I claim:

1. The combination with an axially reciprocatory shaft, of a tool carrier pivoted on said shaft, cam means engaging the .carrier and capable of angular movement relative to the latter to rock the carrier on said pivot, a power shaft, and mechanism connecting the power shaft both to the reciprocating shaft and to the cam means and comprising telescoping transmission elements adapted to vary the angular relation between the power shaft and the cam means.

2. The combination with a hollow shaft, of a tool-carrying element pivotally mounted in said hollow shaft and having an eXtension occupying the interior of said shaft, a laterally projecting head on said extension, said shaft having diametrically opposite openings through which the opposite ends of The head 203,I ashead project, and opposite cams"eng"aging the projecting ends of said head; saidc'ams being adapted'byfrotational movement with respect to the shaft to positivelyshift lthe said pivoted member'about itsiaxis in 'either direction. i 'l 4. The combination with-a :rotary hollow shaft, of a tool' carrier'pivotally mounted insaid shaft and having an extensionoccu'- pying Athe'i'nteriorl of the shaft,-v a-flieadfon said extensiomsai'd shaft having apertures through which'.'the opposite ends'of said said projecting' ends, a lstructure adapted for relative rotation -With respect to l:the shaft, and a set of cams carriedv by said structure and adapted ,to' continuously 'engage the respective rollers whereby said" relatiie yrotational n i'o'vement ofthe shaft Land the 'cam-carryingI structure is adapted! to rock theitool carrierl around its' pivotin either 'direction depending on the'g'diirection of said relative rotation.

al driven shaft, a gear"1oose on= said-driven shaft operatively f connected with 'the driving shaft, telescoping` members respectively -con nected to said gear and 'splined to the shaft and constituting an operative and variable connection between jthe gear andthe said driven shaft, and' mechanism for reciprocating one of said telescoping membersaxially with respect tothe other including a "counter shaft, a cam detachably mounted on said countershaft, and elements interconnecting the cam and the said reciprocating member.

6. The combination with a driving shaft, of a driven shaft, a gear loose on said 'driven shaft operatively connected with the driving shaft, telescoping members respectively connected to the gear and' splined to the shaft and constituting a driving connection between the gear and"the"shaft, means for reciprocating one' of said members with respect to the other to Vvary the angular relation between the gear and the shaft including a countershaft, a member mounted on the shaft and operatively connected with said movable telescoping member, va flexible connection between said member and the countershaft, a' second countershaft, and a cam detachably secured to said latter shaft lhead are adapted to project, rollers on the A and adapted to engage the said member resiliently mounted on the said tirst countershaft'.

7. In a. machine, the combination with tool-carrying devices, of mechanism for operating' upon the said devices to advance the tool to an operative position including a lhand lever, an intermediate member operatively connected with said hand lever and 10 Said devices, a cam operative independent of said handle and adapted to operate upon said devices through Said intermediate meinber to retract the tool Vfrom the operative position intermittently, a resilient coupling between Said hand lever and said intel'- niediate member, and pawl and ratchet means operatively associated with said hand lever for preventing movement of the hand lever when the cam is in operation.

ELMER P. SACREY. 

